CCE-95618-5| Platform: cpe:/o:debian:debian_linux:11.x, cpe:/o:ubuntu:ubuntu_linux:16.04, cpe:/o:ubuntu:ubuntu_linux:18.04, cpe:/o:ubuntu:ubuntu_linux:20.04, cpe:/o:ubuntu:ubuntu_linux:22.04, cpe:/o:ubuntu:ubuntu_linux:23.04 | Date: (C)2021-03-08 (M)2023-09-01 |
The nosuid mount option specifies that the filesystem cannot contain setuid files.
Rationale:
Since the /var/tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot create setuid files in /var/tmp.
Fix:
Run the following command to remount /var/tmp:
# mount -o remount,nosuid /var/tmp
Also the content shown by following command should present in /etc/fstab appropriately:
# echo "$(grep /dev/shm /etc/mtab)"
Parameter:
[yes/no]
Technical Mechanism:
Run the following command to remount /var/tmp:
# mount -o remount,nosuid /var/tmp
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 5.5 | Attack Vector: LOCAL |
| Exploit Score: 1.8 | Attack Complexity: LOW |
| Impact Score: 3.6 | Privileges Required: LOW |
| Severity: MEDIUM | User Interaction: NONE |
| Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | Scope: UNCHANGED |
| | Confidentiality: NONE |
| | Integrity: NONE |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:87347 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:92316 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:68671 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:85197 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:70664 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:70753 |
